Checkerwork construction



Patented June 4, 1929.

UNITED STATES PATENT OFFICE.

EARL G. WI-IELPLEY, OF CLEVELAND, OHIO, ASSIGNOR TO THE SHEA-WHELLPLEY CONSTRUCTION COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO,

" CHECKERWORK CONSTRUCTION.

Application filed March 9, 1928. Serial No. 260,298.

This invention relates to checker-work construction comprising a plurality of bricks assembled in such manner as to provide a plurality of ducts therethrough for heated gases; also to a brick which is specially constructed and adapted for use in the erection of such constructions. The brick and the checker work construction of which it forms a part are especially adapted for use in hot blast stoves, and the embodiment of the invention shown herein will be discussed in connection with its use in such stoves, although it will be understood that I do not thereby limit the invention to such specific use.

The general purpose and object of the invention is to provide a brick which can be conveniently and readily assembled with.

other like bricks to provide a checker work construction having a maximum heating surface; also to provide a checker work construction, including the special construction of brick referred to hereinbefore, which can be quickly and economically assembled.

A still further object of the invention is to provide a brick of the character described which will lend itself to such quick and economical assembly; which can be conveniently interlocked with other like bricks; and which will stand up in operation with a minimum liability of breakage.

I accomplish the foregoing objects in and through the construction and arrangement of parts shown in the drawings, wherein Fig. 1 represents a detail in plan of part of a hot blast stove equipped with checker work and checker-work bricks constructed and ar ranged in accordance with my invention Fig. 2 a detail in perspective of one of the bricks, the convergence of certain parts thereof to a common axis being indicated by dot-anddash lines; and Fig. 3 a detail in section corresponding to the line 3-3 of Fig. 1f

Referring first to the individual bricks of which the checker work is composed, each brick is of T-shape and comprises a base 1 and central stem or mid-feather 2. The outer face 3 of each brick constitutes a section of a cylinder the axis of which is indicated by the line a-a on Fig. 1; and one of the radii extendingfrom the axis to such surface is indicated at b. The sides 4; of the base of each brick are in radial planes extending outwardly-from the axis Li a, the lines 0,0, 0, c indicating radii drawn from the upper and lower edges of the sides to the axis a-0 The sides 5 of the steam or mid-feather 2 also converge toward and meet at the same axis aa, the lines 03, (i, (Z, (1 indicating radii drawn from the upper and lower edges of the sides to the axis aa. Each stem or mid-feather 2 is provided with a central radial rib 6 and a central radial depression 7, the rib being shown at the top of the brick and the recess at the bottom of the brick, although this air rangement may evidently be reversed without affecting the spirit of the invention. Furthermore, the inner end 2 of each mid-feather is concave, to enable it to fit Inoreor less closely against the outer surface of an adjacent brickor against the inner cylindrical wall of a hot blast stove. Each side 5 of the midfeather is connected with the base 1 by means of a concave surface 8. p

In constructing a checker work from bricks such as shown and described, and assuming that the checker work is to be interposed between the inner cylindrical wall 9 of a hot blast stove and the outer wall (not shown), I have found it practicable to use bricks of the same size, and with the same curvature of the face 3 and the same convergence of the sides 4 and 5 for the formation of the first three concentric vertical checker-work walls, changing such curvature and convergence in each successive series of three concentric walls. 1

Referring in particular to Fig. 1, a denotes one'end of the axis or center of the hot blast stove, said axis corresponding to the axis a'a of Fig. 2. The bricks in the first wall surrounding the wall 9 are so constructed that their sides 4 and 5 correspond with radial planes extending from the axis a, and

the outer face 3 of each brick corresponds to a section of a cylinder the axis of which is at a.. The sides 4 of the bricks comprising the innermost wall will contact through their entire extent. lVhen assembled and interlocked in the manner indicated in Figs. 1- and 3, vertical fines 10 will be formed betweenthe 1 wall 9 and the sides of the mid-feathers and the inner sides of the bases of the bricks, the depth of each wall and the depth of the flues depending upon the particular installatiion I in which the checker work is to be used. 1 In laying the next outer wall of bricks, the sides 4 will'not contact throughouttheir extent, due to the fact that they converge toward and, if extended, would meet at points 6 on a circle 7 described from a as a center and 1 ill having radius equal to the depth of one of said bricks. There will be a slight V formed between the sides at of adjacent bricks, but their outer portions will be in contact. Furthermore, the surface formed between the outer faces 3 of the bricks will not constitute a true cylinder, but will approximate thereto.

The sides l of the bricks in the third wall converge toward and, if extended. would meet at points 5/ on the circle it described from the axis a, and at a distance from such axis equal to the depth of two bricks. I in this case, the surface formed by the outer faces of the bricks will still approximate a cylinder, but the f-shaped spaces between the faces 4:, il of adjacent bricks will be somewhat larger than in the preceding wall. I

in starting on the next series of three walls, I employ a new set of bricks, the sides t, 4t of wi'iich are concentric with the a and, if extended, would intersect at the said axis; so also would the sides 5 of the inid feath ers. The second and third walls in the second series will be laid in the same manner as the second and third walls in the first series and so on for succeeding series of walls.

By virtue of the construction and manner of asseinblingthe bricks, I am enabled to obtain a maximum exposed heating surface through each fine to provide a construction which will enable the bricks to be assembled quickly and to forrn a stable con struction. i am also enabled to provide a checker-work construction comprising a plurality of concentric walls, which construction possesses the necessary stability but without he necessity for interlocking the said walls. i here walls are so interlocked, there isdanoer of disruption though expansion and contraction due to variations in temperature between the inner and outer walls. lf'his difficulty is entirely obviated by my construction. Furthermore, the manner of forming the middeathers, with the concave surfaces 8 connecting the same to the bases of the bricks, strengthens the mid-feathers at their intersections with the bases and minimizes the danger of breakage. lllowever, should any brick happen to break, it will be locked agains displaccn'ient by the bricks above and the same rug thus described my invention, what clain lln hot blast stove, the combination, w h cylinc-iiical inner stove wall, of a pin rality of walls of bricks surroundino" the in ner stove wall, each brick being substantially "l shaped nd haviir a base the outer surface whcreo ii, the sides said. Tricks cor er of said a mid-feather said stove, the there in innermost "wall stove wall and the mid lie outer cyit it stove wall, each brick being substantially ll"- shaped and having a base the outer surface whereof is cylindrical, the sides of the said v bricks converging toward the center of said stove and each brick having a mid-feather projecting toward the center of said stove, the mid-feathers in the innermost wall engaging the inner stove wall and the mid-feathers in other Walls engaging the outer cylindrical surfaces of the bricks constituting the wall therewithin, the mid-feathers of each of said bricks being slightly concave at the inner end thereof. 1

3. in a hot blast stove, the combination, with a cylindrical inner stove Wall, of a plurality of walls of bricks surrounding the said stove wall, each brick being substantially llshaped and having a base the outer surface whereof is cylindrical, the sides of the said bricks converging toward the center of said stove and each brick having; a mid-feather projecting toward the center of said stove, the sides of each mid-feather also converging toward the center of the stove, the mid: feathers in the innermost wall engaging the said wall and the mid-feathers in. other walls engaging the outer cylindrical surfaces of the bricks constituting the wall therewithin.

l. in a hot blast stove, the combination, with a cylindrical inner stove wall, of a plurality of walls of bricks surrounding; said stove wall, each brick being substantially llshaped and having a base the outer surface whereof is cylindrical, the bricks in two or more concentric walls being identical in construction and each having sides converging toward the center of the stove, the sides of the bricks constituting the innermost wall coinciding with radial planes extending from the center of the stove and each brick having a mid-feather projecting toward the center of the stove and the sides of which converge at the same angle as the sides of the base of such brick, the mid-feathers in the innermost wall engaging the said stove wall and the mid feathers in other walls engaging the outer cylindrical surfaces of the bricks constituting the wall therewithin.

5. in a hot blast stove, the combination,

with a cylindrical inner stove wall, of a series l of bricks surrounding said stove of walls wall and each series comprising two or more walls, each brick being substantially l shaped and having base the outer surface whereof is cylindrical, the bricks in each series being; identical in construction and each having sides converging toward the center of the stove, the sides of the bricks constituting the innermost wall of each series coincide ing with radial planes extending from the lift center of the stove and each brick in such wall having a mid-feather projecting toward the center of the stove and the sides of which converge at the same angle as the sides of the base of such brick, the mid-feathers in the innermost wall engaging the said stove wall and the mid-feathers in other walls engaging the outer cylindrical surfaces of the bricks constituting the wall therewithin.

6; A brick for the purpose specified, the said brick being of substantially T-shape and having a mid-feather and a base, the outer surface of the base. being cylindrical and the sides of the base and the sides of the midfeather converging toward a common line toward which the mid-feather projects.

7. A brick for the purpose specified, the said brick being of substantially T-shape and having a mid-feather and a base, the outer surface of the base being cylindrical and the sides of the base and the side of the midfeather converging toward a common line toward which the mid-feather projects, the inner end of the mid-feather being slightly con cave.

8. A brick for the purpose specified, the

said brick being of substantially T-shape and having a mid-feather and a base, the outer surface of the base being cylindrical and the sides of the base and the sides of the midfeather converging toward a common line toward which the mid-feather projects, the

sides of the mid-feather being connected witlr the base by concave surfaces and the midfeather having a top surface and a bottom surface, the said surfaces being provided the one with a central radial rib and the other with a central radial recess.

In testimony whereof, I hereunto aflix my signature.

EARL G. WHELPLEY. 

